Apparatus for operating roller window-blinds.



S. P. EVANS.

APPARATUS FOR OPERATING ROLLER WINDOW BLINDS.

APPLICATION FILED NOV-8,1916. I

Patented July 31, 1917.

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SIDNEY PERCIVAL EVANS, OF PETONE, NEW ZEALAND.

APPARATUS FOR OPERATING ROLLER WINDOW -BLINDS.

Specification of Letters Patent.

Patented July 31, 1917.

Application filed November s, 1916. Serial No. 130,238.

To aZZ whom 2'25 may concern:

Be it known that I, SIDNEY PERCIVAL Evans, a citizen of the Dominion ofNew Zealand, and residing at Petone, in the Provincial District oflVellington, in the Dominion of New Zealand, have invented certain newand useful Improved Apparatus for Operating Roller Window-Blinds, ofwhich the following is a specification.

This invention relates to improvements in means for operating curtains.

The invention consists in providing a drum on one end of the curtainroller, and providing a ratchet wheel on the end of same, to be engagedby a gravity pawl when a cord wound upon the drum is slackoned, theparts being so arranged that when the cord is pulled, the pawl isdisengaged and the curtain can be adjusted.

The invention also comprehends improvements in the details ofconstruction and arrangement of parts which will be hereinafterdescribed and particularly pointed out in the claims,

In the drawings Figure 1, is a front elevation, illustrating theapplication of the invention.

Fig. 2, is a side view thereof.

Fig. 3, is a plan view of the drum pawl.

Fig. 4;, is a view of a slightly different form of the invention.

1 a drum, which is fixed to the end of a roller 2, around which acurtain 3, is adapted to be wound, the outer flange 4:, of the drumbeing provided with ratchet teeth the faces 6 of which are radial.

The pivot 7 of the roller is mounted in :1 bracket 8, provided with adepending extension 21. the extreme lower end of which is extendedforwardly and is provided with an eye 25, which is in rear of thevertical plane of the pivot 7. Above the eye 25, a pawl 22, is pivotedat 18, to the extension, and it is provided with a forward extension atthe end of which is an eye 21, located about in the vertical plane ofthe front of the roller. The pawl extends upwardly as at 17, behind theratchet, and is provided with teeth 23, which interlock with the ratchetteeth to hold the roller in set posi tion, the pawl being normally heldin this position by a spring 26.

A. cord 13, is wound around the drum and hangs down from the front ofthe latter. The cord passes through the eye 21, and is deflected andpassed through the eye 25,

the deflection being due to the eyes 21 and 25, being in differentvertical planes.

In Fig. 4, I show an eye 27, disposed below the bracket, which may besubstituted for the eye 25, in the extension.

In operation, assume the parts are in their normal position, as shown inFig. 2. To raise the curtain 3, the operator pulls the cord, and becauseof the position of the eyes 21 and 25, and the deflection in the cordthe pawl 17, is turned rearwardly on its pivot 18, and the teeth 23, aredisengaged from the ratchet, whereupon by further pulling on the cordthe roller is rotated and the curtain is raised. In lowering thecurtain, the same operation is carried out, except that when the pawl isdisengaged, the cord is slackened, and the weight of the curtain and itsstick 16, causes the roller to rotate in the opposite direction.

l/Vhat I claim is,

1. In combination, a curtain roller provided with a drum at one end, aratchet wheel at the outer end of the drum, a bracket in which theroller is mounted, said bracket having a depending extension in thelower end of which is formed an eye located in rear of the verticalplane of the front of the drum, a pawl pivoted to the extension in rearof the vertical plane of the eye, the upper end of the pawl havin atooth which engages the ratchet, said pawl having an intermediateforwardly extended member formed with an eye located intermediate thevertical planes of the eye on the extension and the front of the drum,and a cord wound around the drum and passed through the eyes, wherebywhen pull is exerted on the cord'the pawl is turned on its pivot and thetooth is disengaged from the ratchet.

2. In combination, a curtain roller provided with a drum at one end, aratchet wheel at the outer end of the drum, a bracket in which theroller is mounted, said bracket having a depending extension, a guideeye located below the roller and in rear of a vertical plane through thecenter of the drum, a pawl pivoted to the lower portion of the extensionand in rear of the vertical plane of the eye, the upper end ofthe pawlhaving a tooth which engages the ratchet wheel, said pawl having an intermediate forwardly extended member formed with an eye locatedintermediate the vertical planes through the first mentioned eye and thefront of the drum, and name to this specification in the presence a cordWound around the drum and passed. of two Witnesses.

Eltfid on the cord the pawl 15 eurneo on its pivot and the tooth isdisengaged from the Witnesses:

ratchet. ERNEST SMITH BALDWIN,

In testimony whereof I have signed my JAMES ANDERSON HARDIE.

Gopies of this atent ma be obtained for five cents each, in addressingthe Commissioner of Patents V 7 Washington, 33. t1.

